Remove unnecessary "_external" suffix from libcppbor

Test: Build
Change-Id: I7e0032abb7157a09a3c4eed10e2d88b56a37d931
diff --git a/drm/libmediadrmrkp/Android.bp b/drm/libmediadrmrkp/Android.bp
index f13eb62..9b0d8b8 100644
--- a/drm/libmediadrmrkp/Android.bp
+++ b/drm/libmediadrmrkp/Android.bp
@@ -17,7 +17,7 @@
         "android.hardware.drm-V1-ndk",
         "android.hardware.security.rkp-V3-ndk",
         "libbase",
-        "libcppbor_external",
+        "libcppbor",
     ],
     defaults: [
         "keymint_use_latest_hal_aidl_ndk_shared",
@@ -42,7 +42,7 @@
         "android.hardware.drm-V1-ndk",
         "android.hardware.security.rkp-V3-ndk",
         "libbase",
-        "libcppbor_external",
+        "libcppbor",
         "libmediadrmrkp",
     ],
     vendor: true,